31313243434 has 32 divisors (see below), whose sum is σ = 52509171456. Its totient is φ = 13882777920.

The previous prime is 31313243431. The next prime is 31313243473. The reversal of 31313243434 is 43434231313.

It is a super-2 number, since 2×31313243434² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31313243396 and 31313243405.

It is not an unprimeable number, because it can be changed into a prime (31313243431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251284 + ... + 354640.

It is an arithmetic number, because the mean of its divisors is an integer number (1640911608).

Almost surely, 2^31313243434 is an apocalyptic number.

31313243434 is a deficient number, since it is larger than the sum of its proper divisors (21195928022).

31313243434 is a wasteful number, since it uses less digits than its factorization.

31313243434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103710.

The product of its digits is 31104, while the sum is 31.

Adding to 31313243434 its reverse (43434231313), we get a palindrome (74747474747).

The spelling of 31313243434 in words is "thirty-one billion, three hundred thirteen million, two hundred forty-three thousand, four hundred thirty-four".